title: Digital image-based colourimetric [corrected] tests for amphetamine and methylamphetamine.
abstract: Digital image analysis was applied to the products of simple colorimetric [corrected] tests for amphetamine and methylamphetamine. Adobe Photoshop software was used for colour analysis to obtain analytical data in the form of a Red Green Blue (RGB) value. Calibration curves were developed for each compound and a number of illicit amphetamine samples were analyzed to demonstrate the application of the technique. A wide linear range and low detection limit for both drugs under test facilitated the application to illicit samples. Good agreement with gas chromatographic quantification results was obtained for the illicit samples analyzed by this method. The results show great potential for use as a semi-quantitative field test for illicit drug compounds.
authors.affiliation: Centre for Forensic Science, Department of Pure and Applied Chemistry, WestCHEM, University of Strathclyde, 204 George Street, Glasgow G11WX, UK.
authors.forename: Aree
authors.initials: A
authors.lastname: Choodum
authors.forename: Niamh Nic
authors.initials: NN
authors.lastname: Daeid
mesh_terms: D000661:Amphetamine / Q000032:analysis; D019969:Amphetamine-Related Disorders / Q000175:diagnosis; D002138:Calibration; D000697:Central Nervous System Stimulants / Q000032:analysis; D003124:Colorimetry / Q000379:methods*; D008401:Gas Chromatography-Mass Spectrometry / Q000379:methods; D006801:Humans; D007091:Image Processing, Computer-Assisted; D008694:Methamphetamine / Q000032:analysis; D015813:Substance Abuse Detection / Q000379:methods*
chemical_list: D000697:Central Nervous System Stimulants; D008694:Methamphetamine; D000661:Amphetamine